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我想在我的应用程序中添加一个播放按钮（我正在使用 MediaPlayer），但是当我声明我的 MediaPlayer 时，我可能做错了什么。

package com.example.tones;

import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;

public class TonosSet extends Activity
{
    /**
     * @see android.app.Activity#onCreate(Bundle)
     */
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.tonos_set);

        Intent i = getIntent();
        int position = i.getExtras().getInt("id");

        MediaPlayer mp;

        ImageView imageView = (ImageView) findViewById(R.id.full_image_view2);
        TextView textView1 = (TextView)findViewById(R.id.namesong);
        TextView textView2 = (TextView)findViewById(R.id.artist);
        ImageButton play = (ImageButton) findViewById(R.id.ButtonPlay);
        ImageButton stop = (ImageButton) findViewById(R.id.ButtonStop);
        ImageButton setringtone = (ImageButton) findViewById(R.id.ButtonRingtone);

        switch (position)
        {
            case 0:        
                imageView.setImageResource(R.drawable.picture);
                textView1.setText("soundd");
                textView2.setText("aut");
                break;

            case 1:        
                imageView.setImageResource(R.drawable.picture);
                textView1.setText("sound");
                textView2.setText("aut");
                 break;
        }

        play.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                mp = MediaPlayer.create(TonosSet.this, R.raw.sound1); //Error 
                mp.start();  //Error again
            }
        });
    }
}

我的错误是：

Cannot refer to a non-final variable mp inside an inner class defined in a different method

如果我更改MediaPlayer mp;为final MediaPlayer mp;，则 eclipse 会显示此错误：

The final local variable cannot be assigned, since it is defined in an enclosing type.

我不知道我的应用程序出了什么问题。我已经学习了很多教程，但没有人和我一样的错误，即使我认为我在做同样的事情。

4

1 回答 1

0

I've fixed my problem:

public class TonosSet extends Activity{

private MediaPlayer mp;

=D Thanks and sorry for this noob question.

于 2012-10-06T02:12:13.540 回答